特高压交直流线路平行共用走廊方案电磁环境及平行接近距离研究

Study on Electromagnetic Environment and Approach Distance of Parallel Common Corridor Scheme for UHV AC/DC Lines

对特高压交直流同走廊情况下的电磁环境进行了电气绝缘距离、线路导线间距离的计算,以内蒙古某1 000kV线路与另一条±800kV直流线路共用走廊为例进行计算与分析,得出混合电场满足控制值要求为:同塔双回1 000kV交流线路情况下,导线对地最小高度为21m和18m时,与±800kV直流线路间距62m;2条单回1 000kV交流线路情况下,导线对地最小高度为23m和18m时,2条单回1 000kV交流线路间距74m,与±800kV直流线路间距67m,实现了输电线路与环境保护、土地资源之间的合理匹配。

In this paper, the electrical insulation distance and the distance between lines are calculated for the electromagnetic environment of UHV AC / DC corridor. Taking a 1 000 kV line of Inner Mongolia and another ± 800 kV DC line common corridor as an example, the calculation and analysis are carried out. It is concluded that the mixed electric field meets the control requirements： when the 1 000 kV AC line of the same tower is in the same condition, the minimum height of the conductor to ground is 21 m and 18 m, and the distance between the ± 800 kV DC line is 62 m, two single 1 000 kV AC line spacing is 74 m, and ± 800 kV DC line spacing is 67 m. The reasonable matching between transmission line and environment protection and land resource is realized.